The satellites were to reach the orbit in 6 hours from the start. No immediate reports of causalities have been forthcoming.

The Proton-M is a Russian carrier rocket derived from the Soviet-developed Proton. It is built by Khrunichev, and launched from sites 81 and 200 at the Baikonur Cosmodrome in Kazakhstan.

GLONASS is a radio-based satellite navigation system operated by the Russian Aerospace Defence Forces. It both complements and provides an alternative to the United States' Global Positioning System (GPS) and is the only alternative navigational system in operation with global coverage and of comparable precision.

Citing an unidentified source, RIA Novosti reports that launches from Baikonur will be suspended for the following 2-3 months. The official explanation of the causes is to be voiced in the days to come. About 200 tons of heptyl, a highly toxic fuel, might have been spilled around. “Such incidents have already taken place. I think launches will be resumed in 2-3 months’ time”.

Baikonur is the first and largest cosmodrome in the world. Located in Kazakhstan, it is rented out to Russia till 2050.

Baikonur is closer to the Equator than other launch sites – a situation that facilitates geostationary orbit or orbits less inclined to reach the International Space Station (ISS). This privileged geographic placement enables the launch of more significant payloads.

The cosmodrome has been rented out since 1994. Annual rent stands at $115 million.

The town accommodates over 70 000 people, with 37% being Russian citizens. About 4,000 Russia’s citizens are here almost permanently on business trips to facilitate space launches. The town budget receives over 1 billion roubles a year from the Russian federal budget.